SOUTH KOREA · OPENDART
TOMATOSYSTEM Co., Ltd.
토마토시스템 · 393210 · KOSDAQ · Technology · Information Technology Services
Score
Not ranked: no net buying on the exchange by an individual insider in the last 180 days.
Insider timeline
2 insiders bought within 4 days, 28 Jul to 31 Jul: 2 CEO / chair. The share closed at 2,075.00 on the first of those days and at 3,280.00 most recently (+58.1%).
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
×A sale
A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.
▮Purple band: several insiders bought within 15 days
The band marks the stretch with the most different buyers: at most 15 days long and at least two people. Here it is 28 Jul – 31 Jul, with 2 insiders. Only the strongest stretch is marked. Several people deciding the same thing is harder to explain by one person's private reasons, but insiders often buy together just after a closed period ends, so compare it with the grey weekly bars.
Blue line: this share's price, −28.5% over these six months
The closing price of each day, from 4,585.00 on 2026-04-21 to 3,280.00 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.
Dashed line: the typical stock on the same exchange, −31.9%
Taken from the 1525 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −28.5%, the typical one −31.9%, 3.4 points ahead. It is not an index and not a comparison within one industry.
This company: insiders buying per month, last 12 months
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since |
|---|---|---|---|---|---|---|
| Park Sung Jun | Executive | — | 9 | — | — | — |
| Jo Kil Ju | CEO / chair | 1 | — | 21.3M KRW | 2026-07-28 | +58.1% |
| Lee Gang Chan | CEO / chair | 3 | — | 19.8M KRW | 2026-07-29 | +72.0% |
Purchases against sales
Shares of the reported value of insider transactions in the 180-day window. Sales include disposals for tax, at option exercise or under a pre-set plan, which say little about an insider's view. The split describes what was disclosed; it is not a signal.
Insiders' buying price vs the latest close
Insiders paid 2,234.69 KRW a share on average (5 purchase lines, 3 buyers, 2026-04-06 – 2026-07-31). The close on 2026-10-16 was 46.8% above that price.
The latest purchase (2026-07-31) was at 2,092.00 KRW; the close was 56.8% above that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.
Insider trades on the exchange
Purchases and sales on the exchange in the last 12 months. The filing gives the settlement date; the trade date is two trading days earlier.
| Trade date | Insider | Role | Trade | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-21 | Park Sung Jun | Senior managing director | Sold on the exchange | 50,000 | ₩2,550 | ₩127.5M | DART ↗ |
| 2026-09-18 | Park Sung Jun | Senior managing director | Sold on the exchange | 1,903 | ₩2,154 | ₩4.1M | DART ↗ |
| 2026-09-17 | Park Sung Jun | Senior managing director | Sold on the exchange | 5,504 | ₩2,175 | ₩12.0M | DART ↗ |
| 2026-09-16 | Park Sung Jun | Senior managing director | Sold on the exchange | 5,627 | ₩2,191 | ₩12.3M | DART ↗ |
| 2026-09-09 | Park Sung Jun | Senior managing director | Sold on the exchange | 3,262 | ₩2,154 | ₩7.0M | DART ↗ |
| 2026-09-08 | Park Sung Jun | Senior managing director | Sold on the exchange | 3,709 | ₩2,175 | ₩8.1M | DART ↗ |
| 2026-09-07 | Park Sung Jun | Senior managing director | Sold on the exchange | 2,524 | ₩2,246 | ₩5.7M | DART ↗ |
| 2026-07-31 | Lee Gang Chan | CEO | Bought on the exchange | 3,884 | ₩2,092 | ₩8.1M | DART ↗ |
| 2026-07-30 | Lee Gang Chan | CEO | Bought on the exchange | 6,000 | ₩1,905 | ₩11.4M | DART ↗ |
| 2026-07-29 | Lee Gang Chan | CEO | Bought on the exchange | 116 | ₩1,910 | ₩221,560 | DART ↗ |
| 2026-07-28 | Jo Kil Ju | CEO | Bought on the exchange | 10,000 | ₩2,130 | ₩21.3M | DART ↗ |
| 2026-07-23 | Park Sung Jun | Senior managing director | Sold on the exchange | 10,000 | ₩2,185 | ₩21.9M | DART ↗ |
| 2026-07-22 | Park Sung Jun | Senior managing director | Sold on the exchange | 5,000 | ₩2,110 | ₩10.6M | DART ↗ |
| 2026-04-06 | Kim Dae-heon | Director | Bought on the exchange | 1,960 | ₩4,080 | ₩8.0M | DART ↗ |
Other changes in holdings · 17
Option exercises, grants, new shares, inheritance, gifts, off-exchange trades and trades by companies and funds. Not counted in the score.
| Date | Insider | Role | Reason | Shares | Filing |
|---|---|---|---|---|---|
| 2026-06-02 | Park Sung Jun | Senior managing director | Donation(-) | 38,000 | DART ↗ |
| 2026-06-02 | Park Sung Jun | Senior managing director | Donation(-) | 32,500 | DART ↗ |
| 2026-06-02 | Park Sung Jun | Senior managing director | Donation(-) | 32,501 | DART ↗ |
| 2026-06-02 | Park Sung Jun | Senior managing director | Donation(-) | 37,501 | DART ↗ |
| 2026-03-01 | Park Ju Wan | Director | New report(+) | 2,595 | DART ↗ |
| 2026-03-01 | JEEEYUL LEE | Director | New report(+) | 4,120 | DART ↗ |
| 2025-12-16 | Lee Sang Don | Executive | Donation(-) | 32,010 | DART ↗ |
| 2025-11-25 | Lee Sang Don | Executive | Donation(-) | 1,880 | DART ↗ |
| 2025-11-24 | Jo Kil Ju | CEO | Receipt of donation(+) | 156,145 | DART ↗ |
| 2025-11-24 | Lee Sang Don | Executive | Donation(-) | 156,145 | DART ↗ |
| 2025-11-24 | Lee Sang Don | Executive | Donation(-) | 117,400 | DART ↗ |
| 2025-11-24 | Lee Sang Don | Executive | Donation(-) | 78,073 | DART ↗ |
| 2025-11-24 | Kim Dae-heon | Director | Receipt of donation(+) | 1,280 | DART ↗ |
| 2025-11-24 | Kim Jae Hyuk | Director | Receipt of donation(+) | 1,460 | DART ↗ |
| 2025-11-24 | HUR TAE JOO | Senior managing director | Receipt of donation(+) | 460 | DART ↗ |
| 2025-11-24 | Seo Jung Hoon | Managing director | Receipt of donation(+) | 500 | DART ↗ |
| 2025-11-24 | CHOI YOUNG GEUN | Director | Receipt of donation(+) | 360 | DART ↗ |